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Turn the heat up – A first look at MESSENGER's near-infrared spectra of Mercury using new high-temperature emissivity measurements

Helbert, J. and Maturilli, A. and D'Amore, M. and Sprague, A.L. and Gillis-Davis, J.J. and Izenberg, N.R. and McClintock, W.E. and Solomon, S.C. (2008) Turn the heat up – A first look at MESSENGER's near-infrared spectra of Mercury using new high-temperature emissivity measurements. In: Eos Trans. AGU, Fall Meet. Suppl., 89 (53), U21A-0026. AGU Fall meeting, 2008-12-14 - 2008-12-19, San Francisco, California (USA).

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Abstract

Analyzing the surface composition of Mercury's regolith from remote-sensing measurements is a challenging task. In support of the National Aeronautics and Space Agency's MErcury Surface, Space ENvironment, GEochemistry and Ranging (MESSENGER) mission and especially in preparation for the Mercury Radiometer and Thermal Infrared Spectrometer (MERTIS) instrument on the BepiColombo mission of the European Space Agency and the Japan Aerospace Exploration Agency, we are developing a Planetary Emissivity Laboratory (PEL) at Deutsches Zentrum für Luft- und Rahmfahrt (DLR) in Berlin. The PEL allows measurement of the emissivity of Mercury-analogue materials at grain sizes smaller than 25 μm and at temperatures of more than 400°C, typical for Mercury's low-latitude dayside. The PEL development follows a multi-step approach. We have already obtained emissivity data at mid-infrared wavelengths that show significant changes in spectral behavior with temperature indicative of changes in the crystal structure of the samples. We are currently installing a new calibration target that will allow the acquisition of emissivity data over the full wavelength range from 1 to 50 micrometer with good signal-to-noise ratio. Here we present initial data in the range 1 to 1.4 micrometer, the near-infrared wavelength coverage of the Mercury Atmospheric and Surface Composition Spectrometer (MASCS) instrument on MESSENGER. Even these early PEL measurements have important implications for the analysis of the spectral observations obtained during MESSENGER's first Mercury flyby on 14 January 2008 as well as the data to be obtained during the probe's second Mercury flyby on 6 October.

Document Type:Conference or Workshop Item (Speech)
Title:Turn the heat up – A first look at MESSENGER's near-infrared spectra of Mercury using new high-temperature emissivity measurements
Authors:
AuthorsInstitution or Email of Authors
Helbert, J.UNSPECIFIED
Maturilli, A.UNSPECIFIED
D'Amore, M.UNSPECIFIED
Sprague, A.L.Lunar and Planetary Laboratory, University of Arizon, Tuscon, AZ 85721, United States
Gillis-Davis, J.J.Hawaii Institute of Geophysics and Planetology, University of Hawaii, Honolulu, HI 96822, United States
Izenberg, N.R. APL, John Hopkins University, Laurel, MD 20723, United States
McClintock, W.E.Laboratory of Atmospheric and Space Physics, University of Colorado, Boulder, CO 80303, United States
Solomon, S.C.Department of Terrestrial Magnetism, Carnegie Institute of Washington, Washington, DC 20015, United States
Date:December 2008
Journal or Publication Title:Eos Trans. AGU, Fall Meet. Suppl.
Refereed publication:No
In SCOPUS:No
In ISI Web of Science:No
Volume:89
Page Range:U21A-0026
Status:Published
Keywords:Planetary mineralogy and petrology, Optical, infrared, and Raman spectroscopy, Mercury, Instruments and techniques
Event Title:AGU Fall meeting
Event Location:San Francisco, California (USA)
Event Type:international Conference
Event Dates:2008-12-14 - 2008-12-19
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EW - Erforschung des Weltraums
DLR - Research area:Space
DLR - Program:W EW - Erforschung des Weltraums
DLR - Research theme (Project):W - Vorhaben BepiColombo (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Physics
Deposited By: Stefanie Hempel
Deposited On:05 Jan 2009
Last Modified:27 Apr 2009 15:39

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